Cholera Toxins. Produced by Vibrio cholerae, cholera toxin (CT) is a multimeric enterotoxin that transfers ADP-ribose to a G protein, locking adenylate cyclase in an 'on' position.
echinoderm. n. 1. (Animals) any of the marine invertebrate animals constituting the phylum Echinodermata, characterized by tube feet, a calcite body-covering (test), and a five-part symmetrical body. The group includes the starfish, sea urchins, and sea cucumbers.ny of various invertebrate sea animals having a hard spiny outer covering, an internal skeleton, and a radially symmetrical body. Starfish, sea urchins, and sea cucumbers are echinoderms.
E chinoderms are radially symmetrical animals that are only found in the sea (there are none on land or in fresh water). Echinoderms mean spiny skin in Greek.Many, but not all, echinoderms have spiny skin. There are over 6,000 species.Echinoderms usually have five appendages (arms or rays), but there are some exceptions. chinoderms are radially symmetrical animals that are only found in the sea (there are none on land or in fresh water). Echinoderms mean spiny skin in Greek.